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A strongly basic substance, such as a carbonate or hydroxide of an alkali metal

A series of elements, all of which are radioactive with atomic numbers greater than 88

A triclinic mineral, NaAlSi3O8; a member of the plagioclase and the alkali feldspar series having prismatic cleavage; a common rock-forming mineral in felsic igneous rocks

Substances used to neutralize acid from materials for storage, disposal, handling etc. Typically these include calcium or magnesium carbonate, CaCO3 and MgCO3, respectively

A controlled disturbance of a mixture or solution, largely achieved by mechanical means including vibration

A metallurgical process utilizing acid solution to dissolve metals such as gold, uranium, copper

Machine using air flow to induce separation of aerophilic and hydrophilic particles Air bubbles of a lower pressure lift aerophilic particles to an overflow thereby separating hydrophilic particles

Rock or various type and grade, including sand, used in many cases as fill

The formation of usually fossilized amorphous hydrocarbons from ancient tree resins, having highly variable C:H:O ratios

A bright green or blue green variety of microcline sometimes cut as semi precious stones and for ornamental use